Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 71, NWS Milwaukee, WI

August 21, 2002Iowa County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 21, 2002, 5:10 PM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 65 min. 5 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 21, 2002, 5:10 PM CDT (22:10 UTC)
Expired: Aug 21, 2002, 6:15 PM CDT
In force: 65 min
Issued by: NWS Milwaukee, WI
Area: Whole counties

Counties Iowa County, WI, Lafayette County, WI

The radar

The Milwaukee radar (KMKX), 130 km from the middle of the area, began a volume at 22:12 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where
Aug 21, 5:28 PM CDT	Thunderstorm Wind 65 E	Rewey, WI
Aug 21, 5:45 PM CDT	Thunderstorm Wind 56 E	Mineral Pt, WI
Aug 21, 5:45 PM CDT	Thunderstorm Wind 56 E	Leadmine, WI
Aug 21, 6:00 PM CDT	Thunderstorm Wind 56 E	Gratiot, WI
Aug 21, 6:05 PM CDT	Thunderstorm Wind 70 E	Lamont, WI

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 21, 2:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.2 hours before the alert went out and 138 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1748 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 760 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KMKX 212210
SVRMKE
WIC049-065-212315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
510 PM CDT WED AUG 21 2002

THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  IOWA COUNTY IN SOUTH CENTRAL WISCONSIN
  LAFAYETTE COUNTY IN SOUTH CENTRAL WISCONSIN

* UNTIL 615 PM CDT

* AT 510 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHWEST OF REWEY...OR ABOUT 3 MILES
  NORTH OF PLATTEVILLE...MOVING NORTHEAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  REWEY AT 515 PM CDT.
  LINDEN AT 530 PM CDT.
  DODGEVILLE AT 540 PM CDT.
  RIDGEWAY AT 550 PM CDT.

HAIL UP TO 3/4 OF AN INCH IN DIAMETER AND WINDS GREATER THAN 60 MILES
AN HOUR ARE EXPECTED FROM THIS STORM. IF YOU ARE IN THE STORMS
PATH...SEEK SHELTER INDOORS.

THIS STORM IS CAPABLE OF PRODUCING HEAVY RAINFALL...WHICH MAY FLOOD
LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS
AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT.

HENTZ

The office that day

Everything else NWS Milwaukee, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 21, 5:16 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac, Green Lake	29 min
Aug 21, 5:18 PM CDT	Tornado Warning	MKX	Fond du Lac, Green Lake	57 min
Aug 21, 5:25 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	50 min
Aug 21, 5:54 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Marquette	51 min
Aug 21, 6:17 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac, Green Lake	43 min
Aug 21, 6:24 PM CDT	Severe Thunderstorm Warning	MKX	Green	51 min
Aug 21, 6:25 PM CDT	Flash Flood Warning	MKX	Fond du Lac	4 hr
Aug 21, 6:42 PM CDT	Severe Thunderstorm Warning	MKX	Rock	48 min
Aug 21, 6:57 PM CDT	Special Marine Warning	MKX		93 min
Aug 21, 6:57 PM CDT	Special Marine Warning	MKX		93 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.